Both have a main male character that doesn't want to get married, albeit for different reasons. Also, the interactions between the 2 leads, at least in the first couple of episodes of "Because This is My first life", are pretty similar to the leads in "Full time wife escapist" in they type of discussions they hold (male lead in "Because This is my first life" graphs everything out, as does the female lead in "Full time wife escapist", to a certain point).
